hi i have a 2007 a3 1.9tdi , the previous owner has done a twin electric fan conversion on the radiator. I am not keen on the way the wiring is done and would like change the wiring and tidy it up more . question is does anyone have a wiring diagram for this . or nos what the colors of the fan shroud plug are . number 1 is a thick red wire , 2 is a thin black wire , 3 is a thin green wire and 4 is a thick brown wire . any help would be appreciated please.